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ferromagnetism


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In the strict sense, magnetism occurring in substances in which the electron spins are coupled by quantum-mechanical exchange forces so that, within a single volume element, all electron-spin vectors are in the same direction. Typical materials are pure iron, nickel, and iron-nickel alloys found in meteorites and lunar samples. See also ferrimagnetism; and antiferromagnetism.

Subjects: Chemistry — Earth Sciences and Geography.


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